Cooling system for internal-combustion engines.



E. CAMDEN. COOLING SYSTEM FOR INTERNAL comausnow ENGINES.- APPLICATIQN FILEDJUNE 11. NHL.

Patented Nov. 5,1918.

GGGLIBEG specification of. Letters Patent.

Patented New. 5,

Application filed Finns H, 1917. Serial Ho. mince.

4 ing drawings,

The invention pertains to means for coolinn; internal-combustion engines, and; more especially engines used in antomohiles An object of the invention is to prevent injury the engine hy freezing oi the Water usecl for cooling the cylinders,

@tner objects ancl advantages of the invention will be set forth in the ensuing clescription,

The drawings SllO'W one off the practical forms in which the invention may he em.- hodicul.

Figure l is an elevation View off an automobile engine, anal a sectional view oi a water-supply tank which is connected; in

operative relation with the engine,

2 is a fragmental reproduction of the upper left-hand portion oi Fig. l, but Show ing' a certain outlet opening closeci,

Fig, 3 is a plan View of the parts shown at and around; the point indicated by the arson 3 of Fig, l.

4i is a reprotluction of that portion oi" l at and arouncl the point mamas by the arrow 3, but with certain valves in difierent position.

Like characters of reference designate like parts in all the figures.

Like the usual automobile engine, the engins shown in this instance includes the main booly or crankcase 6; the crank-shaft 7 which is journalecl through said crankcase; the cylinders 8 which rest upon and are bolted to the crank-case; the intake Water manifold 9 which is common to all the cylintiers 8 and boltecl thereto; and the outlet Water manifold 10 which is common to all the cylinders and bolted thereto.

The manner in which the Water passes from the intake manifold 9 through the several cylinders 8 to the outlet manifold 10 is Well known, as is also the fact that heretofore the Water in the tank, radiator, or other source of cold-Water supply is maintained at such level as to keep the cylinder walls practically submerged at all times, Whether the engine is running or not.

in the present instance, the inventor (lispenses with the honey-comb radiator commonly ei ployed and uses the simple tank ll shown; the lower portion of this tank being adapted; to contaln the water requireol and store saitl Water below the line of the lowest water-containing portion of the cylin- (leI's 8, for example, below the line A-A of Fig, l.

The upper portion 12 of the interior of the tank ll is in permanent communication with the lower or Water-containing portion 13, except as partially separated from said lower portion 13 by a p'erforatecl diaphragm i l and by a screen 15 which are employee to prevent undue splashing of the Water from the motion of the automobile This perforated diaphragm ll ancl sccee- 15, While preventing excessive splashing of Water, act to nehulize or atomize the "Water anti thereby aici evaporation ancl cool-' ing; of the water; and the upper wall 16 of the tanlr ll is provided; with an opening 1'? which may he left open for escape of heat ancl sapor,

in further arrangement, a small pump it), which he oi the-Well known centrifugal type, is located in the lower part of the tank ll and adapt-cu to drive water from said to the intake manifold. 9, the outlet nozzle 20' of the pump being connected to the intake manifold 9 by the usual flexible connection 21,

second centrifugal pump 22 is located above the line A e and adapted to forcihly conduct the water from the outlet mani fold 10 back to the tank 11, a flexible connection 23 being used to connect the manifold 10 with the intake pipe 2 of the pump 22 while a similar flexible connection 25 connects the outlet nozzle 26 of saiu pump to a nipple 27 on said tanli.

in arranging to clrive the pumps 19 2111& 22, a belt-wheel 28 on the crank-shaft 'Z' of the engine imparts motion to a smaller loch,-

pulley 29 on the shaft 39 of the pump 22 through a belt 31; and a small belt-pulley 32 on the shaft of said pump imparts motion to a belt-Wheel 33 on the shaft 34: of the pump 19 through abelt 35.

With the parts arranged as described, Water from the lower part of the tank ll. is drawn up by the pump 19 and forced up through the connection through the intake manifold 29; through the cylinders 8; through theoutlet manifold 10; through the vconnection 23;, through the pump] 22; and back through the connection 25 into the tank 11 above the diaphragm 14.

In delivering the waterback into the tank 11 on top ofthe perforated diaphragm 14: the water is atomized or nebulized into condition to more readily vaporize and cool, the vapor and heat rising and passing out the opening 17 previously described.

It will he noted that the intake pipe2-i of the upper pump 22 projects upward from the body of said pump as at 24 and then rearward as at 24 to meet the conv-- m m q "x With the outlet opening 17 at the upper end of the tank 11 closed, the air forced into the tank is forced through the pump 19 and on up into thecylinders 8 through the- Water circuit, the air passing out of the "cylinders through the outlet manifold 10 and through the open outlet 36.

It will be seen that by closing the valves and 38 to exclude all air, and at the same time leaving the valve 39 open, an exclusive water c rcuit may be formed, with the cylinders 8 as a part of said circuit; and that, on

the other hand, by removing the belt 35 and stopping the Pump 19, and at thesame time opening the va ve 38 and closing the valve 39 an exclusive" air circuit'isfcrmecl.

a "ww' +1 wders, a water circuit including said cylinders and a water supply, the water supply being positioned below the level of the cylinders, circulation means in the water. circuit, an air circuit, the Water circuit and air circuit being merged into a single circuit along a portion of their length, circulation means in the merged portion of the circuits,-the circulation means in the merged portion of the circuits being of greater capacity than the circulation means in the water circuit.

5. In a cooling system for engine cylinders, a water circuit including said cylin- Water circuit, an air circuit, the Water circuit and air circuit being mer ed into a single circuit along a portion 0 their length, a pump in the merged portion of the circuits and of greater capacity than the pump in the Water supply, the water supply comprising a tank into which the merged portion of the two circuits discharges, a perforated diaphragm arranged in the tank in position to receive the discharge of the merged portion of the tWocircuits, the tank being extended upward from the diaphragm and being provided with an outlet opening above said diaphragm.

Witness my hand this 6 day of June, 1917 EUSTUS CAMDEN. 

